Effects of horizontal grid resolution on evapotranspiration partitioning using TerrSysMP

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Title:Main Title: Effects of horizontal grid resolution on evapotranspiration partitioning using TerrSysMP
Description:Abstract: Biotic leaf transpiration (T) and abiotic evaporation (E) are the two major pathways by which water is transferred from land surfaces to the atmosphere. Earth system models simulating the terrestrial water, carbon and energy cycle are required to reliably embed the role of soil and vegetation processes in order to realistically reproduce both fluxes including their relative contributions to total evapotranspiration(ET). Earth system models are also being used with increasing spatial resolutions to better simulate the effects of surface heterogeneity on the regional water and energy cycle and to realistically include effects of subsurface lateral flow paths, which are expected to feed back on the exchange fluxes and their partitioning in the model. Using the hydrological component of the Terrestrial Systems Modeling Platform (TerrSysMP), we examine the uncertainty in the estimates of T/ET ratio due to horizontal model grid resolution for a dry and wet year in the Inde catchment (western Germany). The aggregation of topography results in smoothing of slope magnitudes and the filtering of small-scale convergence and divergence zones, which directly impacts the surface-subsurface flow. Coarsening of the grid resolution from 120 m to 960 m increased the available soil moisture for ground evaporation, and decreased T/ET ratio by about 5% and 8% for dry and wet year respectively. The change in T/ET ratio was more pronounced for agricultural crops compared to forested areas, indicating a strong local control of vegetation on the ground evaporation,affecting the domain average statistics.
Identifier:10.1016/j.jhydrol.2018.01.024 (DOI)
Citation Advice:Shrestha, P., Sulis, M., Simmer, C., & Kollet, S. (2018). Effects of horizontal grid resolution on evapotranspiration partitioning using TerrSysMP. Journal of Hydrology, 557, 910-915.
Responsible Party
Creators:Prabhakar Shrestha (Author), Mauro Sulis (Author), Clemens Simmer (Author), Stefan Kollet (Author)
Publisher:Elsevier
Publication Year:2018
Topic
TR32 Topic:Vegetation
Related Subproject:Z4
Subject:Keyword: Modelling
File Details
Filename:Shrestha_etal_2018.pdf
Data Type:Text - Article
File Size:1.2 MB
Date:Accepted: 09.01.2018
Mime Type:application/pdf
Language:English
Status:Completed
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Download Permission:Free
General Access and Use Conditions:According to the TR32DB data policy agreement.
Access Limitations:According to the TR32DB data policy agreement.
Licence:[TR32DB] Data policy agreement
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Publication Status:Published
Review Status:Peer reviewed
Publication Type:Article
Article Type:Journal
Source:Journal of Hydrology
Source Website:https://doi.org/10.1016/j.jhydrol.2018.01.024
Volume:557
Number of Pages:6 (910 - 915)
Metadata Details
Metadata Creator:Prabhakar Shrestha
Metadata Created:07.09.2018
Metadata Last Updated:07.09.2018
Subproject:Z4
Funding Phase:3
Metadata Language:English
Metadata Version:V50
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